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Correction notice This article has been corrected since it published Online First. The affiliations for Kristine Højgaard Allin and Tine Jess have been updated.
Contributors JK, DW and MA: had full access to all the data in the study and take responsibility for the integrity of the data and the accuracy of the data analysis. All authors: concept and design, acquisition, analysis or interpretation of data and critical revision of the manuscript for important intellectual content. DW: drafting of the manuscript. DW, MA, TJ and JK: statistical analysis. TJ and JK: supervision and co-last authors.
Competing interests JK received lecture fees from Pfizer and consulting fees from Roche, Pfizer and Gilead. LB received consulting fees from BMS, Janssen and Mylan; lecture fees from AbbVie, BMS, Janssen, MSD, Ferring and Takeda and research support from AbbVie, Celltrion, Ferring Pharmaceuticals, Hospira-Pfizer, Janssen, MSD, Mylan, Takeda and Tillotts.
Provenance and peer review Not commissioned; externally peer reviewed.
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